Retired High Court judge Sir John Griffith Williams sentenced him to a whole life order on Friday.

Twisted Halliwell even had the cheek to thank him when the sentence was passed.

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The monster had avoided conviction for the killing of Godden after detectives botched the investigation, but a jury today found him guilty.

Wiltshire Police also revealed they "cannot rule" out if Halliwell had killed again between the two murders.

After leading police to Sian’s body in a field, Halliwell – who admitted he was a “sick f***” – asked them if they wanted “another one”.

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HISTORY: Halliwell also killed Sian O'Callaghan

Passing sentence, the judge described Halliwell's account of Miss Godden being buried in the field by two drug dealers as a "cock and bull story".

He added: "Your account of the circumstances in which she met her death bears all the hallmarks of a contrived explanation designed to avoid conviction in the hope that the minimum term you are presently serving will not be increased.

"But the account in which you advanced so glibly with little or no regard to the truth made no sense at all.

"I have had the opportunity of observing you throughout the trial and listening to your evidence.

"I have no doubt that you are a self-centred and domineering individual who wants his own way. You are both calculating and devious."

The judge told Halliwell he would die in prison and as he was led away, he said: "Thank you."